STORM-EZ Update • Comparison of Pre-development and Postdevelopment fate of rainfall STORM-EZ – Discrete CN Method STORM-EZ – Discrete CN Method Runoff from Impervious Surfaces + = Total Runoff Runoff from Open Space STORM-EZ Basic Operation • Application (SWU-101, SWU-102, Renewals, Modifications, etc). • Design Calculations – applicable statewide with error and warning messages to catch common mistakes • Supplement Forms – rolled into calculations sections and summary tables on plan sheets • O&M Agreements –one report per project, generated with easy user input • Reporting – standardized summary reports STORM-EZ– Permit Application • Checklists, Application, and Signature Pages • Forms generated based on type of application STORM-EZ – Calculations • Statewide rainfall data • Multiple design storm options STORM-EZ – Calculations & Data Entry • Easy to use pull down menu options • User defined options STORM-EZ Update – Post Development Land Use • Permeable Pavement and Green Roof design calculations STORM-EZ – BMP Adjustments STORM-EZ – Post Development BMPs • Small scale BMPs still get credit • Treatment Trains STORM-EZ – Fate of Rainfall Runoff Reduction Credits (LID projects only) Constructed Wetland ET Capture Volume Treated Runoff Infiltration Runoff Reduction Credits (LID projects only) Bioretention w/ IWS ET Treatment Volume Soil Storage Post Filtration Discharge Infiltration STORM-EZ – BMP Fate of Rainfall STORM-EZ – Site Summary • Compliance Summary STORM-EZ – Compliance & Volume Matching • Pre-Development sets the target STORM-EZ – Pre vs. Post Analysis Benefits STORM-EZ – Pre vs. Post Analysis Benefits Current Design all impervious • Potential DesignRequirement Modification––treat Conventional or LID Note: “Untreated” impervious should meet DIS design requirements STORM-EZ – Compliance & Volume Matching If: If: Untreated Surface Runoff + Treated Runoff Untreated Surface Runoff <= Pre-Development Runoff <= Pre-Development Runoff COMPLIANCE ACHIEVED VOLUME MATCHING ACHIEVED How “Green” Is Your Site? Hybrid Developments Conventional Development LID Development STORM-EZ – Site Summary • Visual Reporting STORM-EZ - Fate of Rainfall STORM-EZ - O&M Manuals STORM-EZ - O&M Manuals OR • Storm-EZ works for conventional high and low density projects • Storm-EZ works on public roads, commercial, industrial, or residential sites, ultraurban or rural developments • SW101 Application Form • 14 different Supplement Forms • 11 different O&M Agreements STORM-EZ - Training & Workshops STORM-EZ - Training & Workshops • More Technical Discussion about design, installation, and maintenance of small scale BMPs • Intensive Storm-EZ training, case studies, and class participation • Boone – May 7th & 8th • Raleigh – May 14th & 15th • Wilmington – May 21st & 22nd • Fayetteville & Charlotte – Coming Soon QUESTIONS?
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